Transmission.



A. c. JOHNSON.

TRANSMISSION. .APPLICATION'FLLED MAY 25, 1915.

Patented May 0, 191a.

5% f; I a

Y O: I

9 i 0 v I 1W WITNESSES: i mvmfwron -& t4 5 c v("K27 2 612 ti rlvfiizsofi,

O 0 I MW A 55 1 engines. The clutches indicated at 26 and a To alt whom may concern:

1 UNITED STATES ATENT onnron.

v d v ALFRED cjaomvson, or wm'rnns, CALIFORNIA.

' Beitknown that LALrnnn G. Jonnson,

i citizen of the United States, residingat Winters, in the county of Yolo and State of CaIiforniaQhaVe invented new and useful Improvements in' Transmission, of which the following is a specification.

This invention relates to a transmission perticul rly designed'io'r use on'traction engines. A l I I One of" the objects of the invention is to provide a simple, compact transmission of the character: described, in which power is transmittedfroma single drive-shaft to a sectionaljack shaft, and which is provided [withmeans for transmitting power to either or both shafts in either direction";

Further "ob'ects will hereinafter appear; The invention consists" of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompany- .ng drawings, in which-' Figure 1 is a plan viewof a tractor, showing the epplicatioh;ofthe invention. Fig.

f 2 is a central longitiidinal section of one of .the reversing gears.

A indicates the main frameof a tractor, onfwhich is supported an eng ne 2. The tractor maiybe provided" with a suitable i 'orm otsteering wheel 3 and impair of traction wheels 14. Directly connected with the maimengine clutch 5 isa driving shaft 6 whichxe xtendsthrough the transmission case transmission case, is a pair of reversing 7 Mounted on the shaft,interior1y of the 8 an(1,9,end connected with each regearfland adapted to be driven in I i jone direction or theother bysame isa pair ofdriv'ing p nions l0 and 11.

Disposedbat right angles with relation to thema-in driving shaftfi, and journnled in t .f thetransmission case, as at 1 2 and '13, is a l vpair of jack shaits 14 and '15; Mounted on theinner' end of shaft'l l is a beveled gear 16"which constantly intermeshes with the pinion 10, and secured. on theinner end of fshaftliend intermeshing with pinion 11 is r a beveled gear 17 Secured on the outer end of each shaft 14 and 16 is a spur pinion 18 which isadapted to intermesh with either i an external or an internal gear 19 secured on themain traction wheels,

The reversing gears 8 and p the standard type such as are used onimtrine 9 may he I rmsmssron.

or like means, while gear 23 is mounted on i a sleeve 2% which is loosely mounted on the driving shaft. The driving pinion 10 is secured on the sleeve 2-1 and itwill, there: fore, revolvein unison with the sleeve and gear 23. Slidably mounted on sleeve 25, which is secured to the shaft and upon which the beveled gear 22 is mounted, is a clutch 26 which is adapted to be thrown into and out of engagement'with an internal.

clutch face 27 formed on e main casing 20. Clutch 26 is-normally :hrown into engagement with the"clutch 27 of the main casing 20 by a spring 28', causing the two sections of the reversing gear to revolve in unison. As the clutch section 26 is slidebly mounted by a feather and key on the sleeve 25, which is keyed rigidly on the driving shaft, .21 direct-driving connection will be formed between the shaft anddriving pinion 10. A direct drive is thus normally transmitted" through the reversing gear from shaft 6 to the driving pinion 10. This operation is true of both reversing gears as they are similar in construction. If it is desired to release one of the reversing gears Patented may 9, 1916.

Application filed May 25, 1915. Serial No 30,326.

to permit "the adjacentorconnected wheel to turn freely while the wheel on the opposite side is being driven in one direction or the other, r it is only necessary to throw out clutch 26 suiiiciently far to bring the clutch faces out of engagement. No power will ',thcn be transmitted asthe casing20, together with the intermediate pinions 21, will run freely aldout the beveled gear 23. If itis desired to transmit a reverse move ment to the driving pinion it is necessary to first move clutch 26 into position where the clutch feces are out of engagement and then to tightenthe brake band 30 to lock the ,casing 20 against revolving" "movement.

Power will then be transmitted from the intermediate pinions 2l to the beveled gear '23, with connected, sleeve 24, and driving pinion 10,'causing these to revolve in the opposite direction. A reverse movement may be transmitted to either or both traction wheels or-a direct drive may be transmitted to one and a reverse drive to the other, thus permitting the tractor to turn 1n a very small space. Again, either or both of the driving connections may be thrown out by releasing the clutches 26 and the reversing gears or by throwing out the main engine clutch 5. The clutch section 26 of each reversing gear is preferably operated by ashafts let and 15 are offset with relation to clutch and the driving shaft 6,

each other. This permits a direct drive to be transmitted to both or either of the shafts fromthe main driving shaft, the speed ratio of which is equal. This construction permits a compact narrow transmission case and also reduces the number of bearings which would otherwise be required. A tractor of narrow tread can thus be constructed to the wheels of which power is transmitted with the least possible loss of efiiciency through friction, and which can be easily handled and driven in one direction or the other, aS the driving'connections permit both or either wheel to run freely to reverse in unison o'rindependently of each other, or

to drive ahead in unison or independently of each other. A flexible drive and control is thus produced.

While a. transmission case provided with two or more speeds has not been shown in the present case, it is obvious that same may be interposed between the main engine thus permitting the tractor-to be driven at different speeds without altering the engine speed. While the driving pinions 18 are here shown as connected with traction Wheels, it is obvious that they may be connected with the driving sprocket of a? self-laying track tractor and that they may be used for other purposes not here. specified.

Having thus described my invention, what I claim and desire to secure by Letters Patent is 1. In atraction engine, a drive shaft, a pair of driven shafts offset with relation to \ach other, means for transmitting power from the drive shaft to either driven shaft in either direction, means for transmitting a reverse Inovementto the driven shafts in unison or ahead movement in unison, a pair of traction Wheels, and means for transmitting power from the driven shafts to each adjacent traction wheel.

2. In a traction engine, a drive shaft, apair of driven shafts offset with relation to each other, a gear on the inner endof each driven shaft, apair of piniong ears loosely mounted'on the drive shaft intermeshing with the driven shaft gears, one with each gear, means for locking one or both of the pinion gears to rotate in unison with the drive shaft, a pair of tractior gvheelgand means for transmitting pov. r from the driven shafts to each adjacent traction wheeL- i 3. In a traction, engine, a drive shaft, a pair of driven shafts offset with relation to each other,-a gear on the inner end of'each driven shaft, a pair of pinion gears loosely mounted on the drive shaft 'intermeshing with the driven shaft gears, one with each gear, a clutch mechanism connected with each pinion gear for locking or releasing same with relationto the drive shaft, a pair of traction wheels, and means for transmitadjacent traction wheel.

4. In a traction engine, a drive shaft, a pair of driven shafts offset with relation to each other, a gear on the inner end of each driven shaft, a pair of pinion gears loosely mounted on the drive shaft intermeshing with the driven shaft gears, one with each gear, a reversing gear connected with each driving pinion, a pair of traction wheels, and means for transmitting power from the driven shafts to each adjacent traction wheel.

5. In a traction engine, a drive shaft, a pair of driven shafts offset with relation to each other, a gear on the inner end of each driven shaft, a pair of pinion gears loosely mounted on the drive shaft intermeshingwith the driven shaft gears, one with each gear, a reversing gear connected with each driving pinion, means for locking each re-- pair of driven shafts offset with relation to each other, a gear on the inner end of each driven shaft, a pair of pinioi. g 's loosely mounted on the drive with the driven shaft gears, 'one' with each gear, a reversing gear connected with each driving pinion, independent means connected with each reversing gear and driving pinion for locking same to revolve in unison with the driving shaft, a pair of traction wheels, and means for transmitting power from the driven shafts to each adjacent, traction wheel.

7. In a traction engine, a drive shaft, a pair of driven shafts offset with relation to "each other, a gear on the inner end of each shaft inter-meshing nit 10 dinaily extending drive shaft, a pair of driven with the driven shaft gears, one with each gear, a reversing gear connected with each driving piniony means for transmitting I puwen from the drive shaft to each reversing gear to -revolve the driving pinions in a reverse direction to the drive shaft, a pair of traction wheels, and means for transmitting power fron the driven shafts toeach nd -acent traction wheel.

S. In a traction engine, a central longitushafts, means for transmitting power from the drive shaft to either witnesses.

ALFRED G. JOHNSON. Witnesses:

L. D. HOBACK, v J. H. MGCULLOUGH, Jr. 

